岩矿测试2024，Vol.43Issue(4)：558-567,10.DOI:10.15898/j.ykcs.202402280023
高钙碳酸盐岩样品中微量钛ICP-MS测试方法
Determination of Trace Ti in High Calcium Carbonate Rocks by ICP-MS
陈菲菲 1金斌 1杨梦娜 1陈瑜 1冉敬 1徐国栋1
作者信息
- 1. 中国地质调查局成都地质调查中心,四川成都 610081
- 折叠
摘要
Abstract
The content of Ti in carbonate rocks is generally lower than 3.5mg/g,and most of it is below 1mg/g.X-ray fluorescence spectrometry(XRF),which is commonly used to measure Ti content in silicic rocks(usually more than 0.1％),cannot meet the requirements of accurate measurement of trace Ti in carbonate rocks.This paper reports on the attempts to test Ti in carbonate rock by inductively coupled plasma-mass spectrometry(ICP-MS),discusses and analyzes the interference of 5 test isotopes of Ti(46Ti,47Ti,48Ti,49Ti,50Ti)in carbonate solution matrix,and determines the suitable test isotope 48Ti.Then the ICP-MS method for the determination of trace Ti in carbonate rock is proposed.According to the method,the concentration of Ti in 5 first-class national standard materials was tested and corrected.The measured values were consistent with the certified values,and the relative standard deviation(RSD,n=10)was less than 7.3％.The concentration of Ti in the unknown carbonate sample solution was measured and corrected under the same experimental conditions,and this method was compared with the national standard method of diantipyrine methane spectrophotometry and inductively coupled plasma-optical emission spectrometry(ICP-OES)method,and the relative standard deviation with these two methods were less than the allowable limit.The recoveries were 83％-107％.This method is suitable for the determination of carbonate samples with 31％-56％CaO and 14-3346pg/g Ti,and provides a reference for the determination of trace Ti in carbonate rocks with high calcium and magnesium.关键词
碳酸盐岩/电感耦合等离子体质谱法/Ti/同位素选择Key words
carbonate rocks/inductively coupled plasma-mass spectrometry/Ti/isotope selection分类
天文与地球科学引用本文复制引用
陈菲菲,金斌,杨梦娜,陈瑜,冉敬,徐国栋..高钙碳酸盐岩样品中微量钛ICP-MS测试方法[J].岩矿测试,2024,43(4):558-567,10.
